Text Input Traits - Return Key

I am a newbie to iPhone dev...been doing other GUI dev for 15 years is various languages/technologies.

Is there a "simple" way to use the IB 'Text Input Traits - Return Key' feature to move the cursor from one textbox to another to another and then to the "submit" button when the user hits 'return'?

I know that I can setup a UITextFieldDelegate to handle textFieldShouldReturn and look at the textField passed in and then manually set a different textfield as the first responder, but shouldn't this be done automatically somehow? If I am setting "Next" or "Send" as the value of the Text Input Trait for Return Key, what does this do for me if this does not set something like this up? Shouldn't it just follow the tab order and move me to the next field without setting up any delegate code? It seems really funny to write code like this. Isn't there a way to set a 'default button' and have it get 'clicked' by hitting the return key?

I feel like I must be missing a concept here.

Thanks for your help,

Gary